Oh OGI, how funny are you guys...
They have no idea what supports what. They've created what is basically an incredibly flexible system but because we can all do different things, they just go back to "not supposed to do that". In the defence of the Support team, they "support" the designed processes of the system, so if it's a useful "mistake" in coding, they'll not get involved.
OpenPrintManager isn't designed to support anything really, it's just a glorified print queue. It'll do whatever Core (Brooms) or Windows tells it to. That's why proposal forms print off single sided normally along with printouts etc.
In simple terms, OpenWord letters obey Windows rules and Brokerlink (prop's etc) obey OGI rules.